当我尝试通过 Sqoop 导入所有表时，出现以下错误：
sqoop import-all-tables -m 12 --connect "jdbc:mysql://quickstart.cloudera:3306/retail_db" --username=retail_dba --password=cloudera --warehouse-dir=/r/cloudera/sqoop_import
Please set $ACCUMULO_HOME to the root of your Accumulo installation.
17/04/23 15:29:27 INFO sqoop.Sqoop: Running Sqoop version: 1.4.6-cdh5.8.0
17/04/23 15:29:27 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead.
17/04/23 15:29:27 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.
17/04/23 15:29:27 INFO tool.CodeGenTool: Beginning code generation
17/04/23 15:29:27 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `categories` AS t LIMIT 1
17/04/23 15:29:27 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `categories` AS t LIMIT 1
17/04/23 15:29:27 INFO orm.CompilationManager: HADOOP_MAPRED_HOME is /usr/lib/hadoop-mapreduce
Note: /tmp/sqoop-cloudera/compile/e8e72a2e112fced2b0f3251b5666473d/categories.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
17/04/23 15:29:30 INFO orm.CompilationManager: Writing jar file: /tmp/sqoop-cloudera/compile/e8e72a2e112fced2b0f3251b5666473d/categories.jar
17/04/23 15:29:30 WARN manager.MySQLManager: It looks like you are importing from mysql.
17/04/23 15:29:30 WARN manager.MySQLManager: This transfer can be faster! Use the --direct
17/04/23 15:29:30 WARN manager.MySQLManager: option to exercise a MySQL-specific fast path.
17/04/23 15:29:30 INFO manager.MySQLManager: Setting zero DATETIME behavior to convertToNull (mysql)
17/04/23 15:29:30 INFO mapreduce.ImportJobBase: Beginning import of categories
17/04/23 15:29:31 INFO Configuration.deprecation: mapred.jar is deprecated. Instead, use mapreduce.job.jar
17/04/23 15:29:32 INFO Configuration.deprecation: mapred.map.tasks is deprecated. Instead, use mapreduce.job.maps
17/04/23 15:29:32 INFO client.RMProxy: Connecting to ResourceManager at quickstart.cloudera/192.168.40.134:8032
17/04/23 15:29:37 INFO db.DBInputFormat: Using read commited transaction isolation
17/04/23 15:29:37 INFO db.DataDrivenDBInputFormat: BoundingValsQuery: SELECT MIN(`category_id`), MAX(`category_id`) FROM `categories`
17/04/23 15:29:37 INFO db.IntegerSplitter: Split size: 4; Num splits: 12 from: 1 to: 58
17/04/23 15:29:38 INFO mapreduce.JobSubmitter: number of splits:12
17/04/23 15:29:38 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1492945339848_0010
17/04/23 15:29:39 INFO impl.YarnClientImpl: Submitted application application_1492945339848_0010
17/04/23 15:29:39 INFO mapreduce.Job: The url to track the job: http://quickstart.cloudera:8088/proxy/application_1492945339848_0010/
17/04/23 15:29:39 INFO mapreduce.Job: Running job: job_1492945339848_0010
17/04/23 15:29:52 INFO mapreduce.Job: Job job_1492945339848_0010 running in uber mode : false
17/04/23 15:29:52 INFO mapreduce.Job: map 0% reduce 0%
17/04/23 15:29:52 INFO mapreduce.Job: Job job_1492945339848_0010 failed with state FAILED due to: Application application_1492945339848_0010 failed 2 times due to AM Container for appattempt_1492945339848_0010_000002 exited with exitCode: 1
For more detailed output, check application tracking page:http://quickstart.cloudera:8088/proxy/application_1492945339848_0010/Then, click on links to logs of each attempt.
Diagnostics: Exception from container-launch.
Container id: container_1492945339848_0010_02_000001
Exit code: 1
Stack trace: ExitCodeException exitCode=1:
at org.apache.hadoop.util.Shell.runCommand(Shell.java:578)
at org.apache.hadoop.util.Shell.run(Shell.java:481)
at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:763)
at org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor.launchContainer(DefaultContainerExecutor.java:213)
at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:302)
at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:82)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Container exited with a non-zero exit code 1
Failing this attempt. Failing the application.
17/04/23 15:29:52 INFO mapreduce.Job: Counters: 0
17/04/23 15:29:52 WARN mapreduce.Counters: Group FileSystemCounters is deprecated. Use org.apache.hadoop.mapreduce.FileSystemCounter instead
17/04/23 15:29:52 INFO mapreduce.ImportJobBase: Transferred 0 bytes in 19.6175 seconds (0 bytes/sec)
17/04/23 15:29:52 WARN mapreduce.Counters: Group org.apache.hadoop.mapred.Task$Counter is deprecated. Use org.apache.hadoop.mapreduce.TaskCounter instead
17/04/23 15:29:52 INFO mapreduce.ImportJobBase: Retrieved 0 records.
17/04/23 15:29:52 ERROR tool.ImportAllTablesTool: Error during import: Import job failed!`enter
看起来应用程序大师不断被杀死，这意味着他们没有获得他们想要的那么多内存。如果您只是在 cloudera 虚拟机上尝试 sqoop，请不要使用
-m 12--direct--warehousedir=/r/cloudera/sqoop_import/r//user/试试这个：
sqoop import-all-tables \
--connect "jdbc:mysql://quickstart.cloudera:3306/retail_db" \
--warehouse-dir=/user/cloudera/sqoop_import
--username=retail_dba \
--direct
--password=cloudera;
尝试加载第一个表而不是 import-all-tables，同时尝试在使用 import-all-tables 时限制映射器，12 个映射器会阻碍虚拟机上的内存。
sqoop import-all-tables \
--connect "jdbc:mysql://quickstart.cloudera:3306/retail_db" \
--warehouse-dir=/user/cloudera/sqoop_import
--username=retail_dba \
--password=cloudera
-m 2